Think that could be exactly what some people are looking for a simple drum machine for training. It comes with an assortment of rhythms but the good thing is that you can upload your own midifiles and there is a lot of them floating around on the net.There is also some very advanced ones that has been made for drum software .So if you like the sound it could be useful for recording to just download the midifiles that you like and trigger drum sounds with the app.There is a free one and the limitation is that it is only for eight bars but at the same time it could be enough for a lot of things and you get to try it out...I think that I want to try it next week with some more advanced midifiles and see how that sounds like.